Windshield wiper



5 Shets-Sheei 1 .IIIIIIIIllllllnlllfllllftdlllawlafrllllnl n rullini n f: .L h r.. r

Nm. ....5 Aw. @i

- E. o. 'sATHER May 10.1927;

WINDSHVIELD wIPR Fued Feb. a.v 1925 May l0, 1927. 1,628,198v

y y. E. o. SATHER v A wINDsHIELD WIFE@ l Filed Feb, 2. 1925 s sheets-sheet 2 A am@ Patented May 10, 1927.

EDMUND 0. SATHER, OF

OAKLAND, CALIFORNIA.

WIN'DSI-IIELD WIPER.

Application filed February This invention relates to an improved windshield wiper, although the invention is applicable to other uses, and seeks, among other objects, toprovide a dependable automatic device of this character operable by engine suction for cleaning the surface of the windshield. j

The invention seeks, as a further object, to provide a device embodying a reciprocating squeegee as contradistinguished from a swinging squeegee as prevalently employed, and wherein continuous motion will be imparted to the squeegee throughout the interval that engine suction is communicated to the device.

A further object of the invention is to provide a novel cylinder structure as well` as a novel piston structure and assembly of parts whereby the device may be economi.- cally produced.

Another object of the invention is to provide a novel valve structure and associated trip mechanism for automatically reversing the travel of the piston.

And the invention seeks, as a still further object, to provide a device which, in use, will serve to clean the windshield glass throughout the major portion oft the windshield so that the driver may enjoy clear and unrestricted vision through the winds shield. j

Other and incidental objects will appear hereinafter.

in the accompanying drawings:

Figure 1 is a vertical longitudinal scctional view through the improved wiper, `the device being shown applied to a conventional windshield.

Figure 2 is a horizontal sectional view on the line 22`of` Figure 1, looking in the direction indicated by the arrows.

Figure 3 is a transverse sectional view on the line 3-3 of Figure 2, looking in the direction indicated by the arrows, this view particularly showing the shape of the cyl.- inder employed.

Figure a is a transverse sectional view on the line 1 4 Aof Figure 2, looking in the direction indicated by the arrows, this view particularly showing one of the springs used in connection `with the packing washers oit the piston.

Figure 5 is a detail sectional view on the line 5*:5 of Figure 2,-looking in the direc tion indicated by the arrows.

Figure (i is a detail sr/C'illai VlfW the 2, 1925. Serial N0. 6,401.

line 6 6 of Figure 2, looking in the direction indicated by the arrows.

Figure 7 is a horizontal sectional view on the line 7-7 of Figure 1, looking in the direction indicated by the arrows, this view particularly showing the valve mechanism and associated parts.

Figure 8 is a detail perspective view o'l the valve retaining plate.

Figure 9 isa detail perspective view of the bracket arm employed.

Figure 10 is a fragmentary elevation showing the backing spring of the cylinder flap employed.

Figure 11 is a perspective view showing certain of the parts of the device disassenr bled but in proper relative position.

In carrying the invention into effect, l employ a fla-t channel-shaped cylinder 10 having parallel top and bottom walls joined. by a curved connecting wall at one side of the cylinder while, at its opposite side, the cylinder is open, and projecting from the walls of the cylinder at the open side thereof are oppositely directed ilanges 1l and l2 extending from end to end o'l the cylinder'. Overlying the flange 11 is a i'lap 13 extending across the open side of the cylinder 'to bear against the flange 12, and formed in the outer side of the flap near the upper edge thereof, is a groove 14: extending from end to end of the flap and weakening the flap at the said groove so that the lower portion of the flap may readily tier: with respect to the upper margin thereof. The Hap is preferably formed of leather or other suitable material and overlying the iiap is a Hat backing spring 15 of a width equal to that of the flap. The spring also ei;- tends from end to end of the flap, and inserted through the flange 11 of the cylinder 10, through the flap and through said spring, are spaced screws 16 securing the parts in position. As shown in ldetail in Figure 10, the spring 15 is slotted transversely and is thus formedv at its lower margin with a series of spaced tongues 17 overlying the lower margin of the tlap. Abutting the upper margin ot the backing spring is a housing 18 overlying the spring as well as `the flap and, as particularly shown in Figure 3, the screws 16 are enga-ged through the housing so that the screws thus also serve to secure the housing in place as well as clamp the backing s ring and Hap between the housing tac iange 1.1 ot

`the

said rod endnfise toward the right, so that arin S5 of the rod will be caused to swing' the rocker il so Ythat the angle plate 73 and lug 74e v-.iill he inoved from the position illustrated in Figure 7 at the forward side of the slide 75, to occupya corresponding' position at the rear of the slide. Thus, as the rocker reaches the end of its throw, the spring;` TT will tend to shift the slide forwardly along the tongue 65 and at the instant when Vthe sidewise thrust ofthe springon the slide becomes sufficient, the slide will be quickly snapped from the position at the rear end of the slot G7 to a position at the forward end of said slot. Since the inner end of the slide is smaller in diameter than `the valve, the slide will travel a corresponding' distance independently of the valve, with the result that the inner end of the slide will strike the wall of the valve with some force. The blow on the valve will not only tend to set the valve into inotion but will also tend to tip the valve so that the seal between the valve and the fiat face lf3 of the bloeit e? will be broken and the valve shifted by the slide forwardly along said face. Forward increment of the valve will, of course, be limited by the lug` (34 so that the valve, when in its forward position, will span the inner ends of the passages 50 and 54. rllhusv engine suction will be communimted tothe left hand end of the cylinder l0, with the result that the piston will be shifted to the left. As the piston reaches the end of its throw7 the a-rin 89 will strilre the leg 82 of the trip rod 8l and shift said rod to 'the left, as seen in Figi/ure 7, with the result that the rocker 71 will be returned to the position shown in this figure of the drawings. The thrust of the spring' 77 will then immediately function to shift the slide 75 rearwardly to the position shown and return the valve rearwardly to engage the lug 66. The slide 75 will, of course, thus again be caused to strike the valve for tipping' and quickly shifting` the valve and, as will be seen., the mechanism will function to reverse the movement ofthe piston at the end of its travel in each direction as long' as engine suction is conununicated through the pipe 52.

lilavinn thus described the invei'ition, what l claim is:

l. ln a wiper niechanisnn a cylinder having a. flexible wall, a suction operated piston reciproczhle iu the cylinder, ineens carried by the piston to forni a 'bulglge in said wall traveling along` the wall with the piston, an arni caiiiled by the piston and extending; from said cylinder thi-(nigh said bulge, a wiping @lenient carried by said arni, and means for automatically reversing' the trarel `of the piston.

2. ln a wi )er mechanism a cflinden aA Y l a l flap closingthe cylinder, a suction operated piston reci'pi'ccable in the cylinder, means carried hy the `piston llcstiugr said llup lo forni a bulfle therein traveling aloha' the flap withthe piston, an arm carried by the, piston extending' from the cylinder through said bulge7 a` wiping element carried by said arin, and nieans for automatically revel-shui' the travel of the piston.

3. ln a iperinecluinisni, a cylinder, u llap closing the cylinder` a sin-tion operated piston reciprocahle in the cylindre; means curried by the piston flexing; said flap to forni a bulge therein traveling;` along); the [lap with the piston, an arui carried by the piston extendingr from `thc cylinder through said bulge, a wiping' element carried hy said urlu. means for automatirally rcversina the trai'rl ofthe piston, and a backing sprinpy overlying said flap .normally holdingA the flap closed.

sl. ln a wiper niechanisnn, a, cylinden a llap chasing the cylindeu a suction operated piston reciproealile in the cylindern a roller rarried by the piston flexing); said l'lap lo form a 4l'iulne therein traveling alone` the `llap with the piston` an arnicarried by the piston ci;- teiidingi from the cylinder through said bulge, a wiping; element carried by said arun and means for automatically reversing the travel of the pistou.

5. ln a wiper nierhanisni, u cylindeix a suction oiicraleil pistoii reciprorable therein and provided with a recess, ail'lap normally riosing the cylinderv a roller journaled in said recess and flexing the '[lap to forni a bulge therein traveling alone' `the flap with the piston,v an arin lined to the piston `to entend from the cylinder through said buitre and provided with a tongue sustaininp` the roller .in said recess a wiping` elenient carried by said arnn and ineens for autoinatically rcrersing the travel of the piston.

(i. ln a wiper nicehanisnn a flat channelshaped cylinder open at one side, a spring` pressed flap normally closing): `the open side of thc cylinder, a suction operated pistoii reciprocable in the cylinder, end washers carried by' the piston, springs on the piston pressing;l said washers to lit in the angles between said flap and the :nl iacent walls of the cylinder, ineans carried by the pisti'in flexing); said flap to forln a bulpge therein ti."ai'eliiu` aloilp; the flap with the piston` an arn'i carried by the piston and cnlendini from the cylinder through said hulpje, a wiping* element carried hy said arin, and nieans for automaticaily `i'eversingr the travel of the. piston.

l'. ln a, wiper nicrhaniznn, a cylindcn heads closing; the endif1 of the cylinder und provided with pass g i, a criiiss tube pro- -vided at its ends with sleeves abuttingr thc heads, tubular fastening devices extending-r freely through said sleeres and screwed into said passagier o communicate therewith, said fastening" devices being; provided with opentill lll!

ill!

llt!

l mi

fifi

ings establishing communication between the passages through the sleeves and said cross tube, a suction operated piston reciprocable in the cylinder, a valve associated with one et the heads for alternately connecting` the ends of the cylinder through said passages with a source ot suction, and means operable by the piston for actuating said valve.

8. ln a wiper mechanism, a cylinder, a suction operated piston reciprocabie therein, a wiper element suspended on the piston, a single transversely slidable valve mounted at one end of the cylinder below the path of the piston, means including; a rocker mounted on the cylinder above the valve for snapping the valve in opposite directions to alternately connect the ends of the cylinder with a source of suction, and means coacting with the rocker operable by the piston for actuating the rocker.

9. ln a wiper mechanism, a cylinder, a suction operated piston reciprocable therein, a single valve slidably mounted transversely at one end oi. the cylinder below the path ot the piston, a slide engaged directly with the valve for sluiting,` the valve in opposite directions to alternately connect the ends of the cylinder with a source of suction, a rocker mounted on the under side ot the cylindei above the valve, a spring bearing between and connectingthe rocher and the slide, and means operable by the piston coacting with the rocker for actuating` the rocker and the springi to shift the slide in opposite directions.

l0. ln a wiper mechanism, a cylinder, a suction operated piston reciprocable therein, a single valve slidably mounted transversely at one end ot the cylinder below the path ot the piston, a slide having` a lost-motion connection directly with the valve and shittable to move the valve .in opposite directions to alternately connect opposite ends of the cylinder with source of suction, means for sl'iitting the slide, and means operable by the piston tor actuating said shitting means.

ll. ln a wiper mechanism, a cylinder, heads closing` the ends ot the cylinder, a suction operated piston reciprocable in the cylinder, a wiper element rigidly suspended on the piston, passages in the heads opening into the cylinder, a source ot suction common to said passages, a single transversely slidable valve associated with one ot the heads below the cylinder for alternately connecting;` the ends ot the cylinder through said paswith the source o't suction, and means operable by the piston ior actuating the valve.

12. In a wiper mechanism, a cylinder, heads closinfr the ends of the cylinder, one ot said heads being provided with an extension block below the cylinder, a suction operated piston reciprocable in the cylinder, a wiper element rigidly suspended Ytrom the piston, the heads being` formed with passages opening 'into the ends ot the cylinder and leading therefrom into said block, means tor connecting,- the block with a source of suction, a single transverse valve slidable against said block below the cylinder and movable in op* posite directions tor alternately connecting` the ends et said passages with the source ot suction, and means operable by the piston for actuating said valve.

18. ln a wiper mechanism, a cylinder, a suction operated piston reciprocalole therein, a wiper element suspended on the piston, a single transversely slidable valve mounted below the cylinder at one end thereot to connect the opposite ends oi the cylinder alternately with a source, ot suction, a slide mounted immediately adjacent the valve and having one end engaged directly therewith, a rocher mounted adjacent the slide, a spring connecting,` the rocker with the slide, a trip rod engaged at one end with the rocher, and means whereby travel of the piston, and the wiper element will actuate said rod.

lll. ln. a wiper mechanism, a cylinder, a

mounted adjacent the slide, a spring connecting the rocker with the slide, anda trip rod slidable along the cylinder and provided at one end with a lateral arm engaged with the rocker and having spaced arms at opposite sides ot the wiper element to be engaged alternately by said element whereby travel ot the piston and the wiper element will actuate the rod and the rocker.

l5. ln a wipermechanism, a cyliiider, heads closing; the ends ot the cylinder, one head havingy an extension below the cylinder and there being,v [massages inthe heads and in said extension connnunieating with the cylinder and a source ot suction respectively, siflction operated piston in the cylinder, i wiper element carried by the piston, a hollow valve slidable below the cylinder and against said extension whereby to connect opposite ends ot the cylinder alternately with the source ot suction, yieldable means holdingthe valve against the extension to seal the passages therein, a slide having;` one end playinig1 in the valve to impinge against the wall thereot and tilt the valve to break the seal, and means controlled by the piston and the wiper element to shift the slide and the valve.

i6. ln a wiperl mechanism, a cylinder, a suction operated piston reciprocable therein, a wiper element suspended on the piston, a single transverse slidable valve below the loo liu

JLM-amm cylner a one end thel'eo to Connect the said :stud and, :1t its Uppoji@ umd ma ihm opposite ends' of the cylinder :l'wxhmly free @mi 0f the slide? :md mmm willi-HHM Wh a soulce of Sucon, a guide adjacent by the piston and the Wipu @humm im the Va ve, a slid@ mouned in said guide and actuatingth rocker.

engaged at one end in the valve, a rocker ntesmrmy whereof I :Mill: my signature. mouned adjacent "che slide, z1- Suud 011 the rocker, n spring engaged at one end upon EDMUND U. @UHRM [11. l1 

